The crossover story of Phineas and Ferb and Future is Wild.
Disclaimer: I don't own Phineas and Ferb and Future is Wild.
Chapter 1 To 200 Million Years In The Future
Many years had passed, Phineas, Ferb and their friends are now teenagers and went to the college.
They study for many months until the end semester came and another summer arrive. They all go back
to their homes and like when they're kids, they doing this and that all times, the thing that changed
is that Candace is tired of to have them busted and trying to hang out more with Stacy and Jenny.
Next day arrive, which is the first day of summer of this year.
In bedroom of Phineas and Ferb...
"*YAWN!* Hey Ferb!"Said Phineas and Ferb's slowly open his eyes.
"Got any idea of what should we do today?"Asked Phineas and Ferb shakes his head as no.
"Hmm... maybe..."Said Phineas and he's think back of the time when he and Ferb were kids and doing time travel.
Most of the favorites are about going to future and see the wonders that evolution had created after humans had gone from Planet Earth.
"Ferb! I know what're we gonna do today!"Said Phineas but then his stomach is send him a sign of hungry.
"But right after we filled our stomachs with foods and take bath."Said Phineas
Meanwhile, in the Kitchen, Perry is eating his foods and then a watch on his wrist is alerting. He's quickly walk out into the backyard
and open it and see face of Carl, who is now in charge of O.W.C.A after Major Monogram had retired.
"Agent P! We found that Dr. Doofenshmirtz doing time travel so many times since the last month. We don't want to take anymore risk
about the accident like the time paradox to happen. You must go and stop him from doing it!"Said Carl and Perry's nod and wear
his fedora and the propeller that come out from it and fly to find his nemesis.
Later, after ate their breakfast, take showers and changed their clothes, Phineas and Ferb begin to searching for the Time Machine 3.0
that they had invented since they're kids. then, Ferb found it inside the pillow on his bed.
In the meantime, at Doofenshmirtz Incorporated...
"Doofenshmirtz hmm-hmm Incorporated!"Singing Voices
Perry's fly inside the building and landed behind Dr. Doofenshmirtz, who is busying with repairing the sail of the Time Ship.
"Oh hey! Perry the Platypus! What bring you here?"Asked Dr. Doofenshmirtz and Perry's point to him.
"What I didn't do anything evil! I'm just doing time travel a lot!"Said Dr. DOofenshmirtz and Perry's nod to him as "that is why I came here".
"Oh! You think that my time travelling is going to cause the time paradox?! Oh no worry about that! I'm not messing with the past. I'm messing
with the future! 200 million years from now. I teaching the new sapient beings of Earth to create a civilization!"Said Dr. Doofenshmirtz and Perry's raise an eyebrow.
"If you don't believe me, why don't you come with me. Besides, I promised to them that I bring a creature from the Netherworld of their religion
back to show them. And you're going to be perfect for being it!"Said Dr. Doofenshmirtz and he's grab Perry and
put the orange Egyptian wig on his head and a fake of the set sharp teeth into his mouth.
"Now, you're perfect!"Said Dr. Doofenshmritz and he's take off his clothe and revealed the Ancient Egyptian clothe
that he's wear inside. Then, he's pull a scepter with ankh as its head out from behind.
"To the Time Ship!"Said Dr. Dofoenshmritz and he's grab Perry with him and run to the Time Ship. Then, he's activate it, forming the portal and sail into it.
"WOO-HOO!"Shouted Dr. Doofenshmirtz
Meanwyhile, at the Backyard of Flynn-Fletcher's house...
"Everyone ready?"Asked Phineas
"Ready!"Said Everyone
"Then press on!"Said Phineas and Ferb's use the Time Machine 3.0 to open the portal to 200 million years in the future.
"Let's get in!"Said Phineas and he's run with Isabella, Buford, Baljeet, Ginger, Adyson, Gretchen, Holly, Katie and Milly.